Sash-latch lock and antirattler.



BEVILL W. WHITWORTH, OF CEDAR FALLS, IOWA.

i SASH-LATCH LOCK AND ANTIRATTLER.

Specification of Letters Patent.

Patented Nov. 12, 1918.

Application tiled .Tune 19, 1918. Serial No. 240,814.

To all 'whom it may concern:

Beit known that I, BnvrLL W. WHIT- w'oRTH, a citizen of the United States, residing at Cedar Falls, in the county of Blackhawk and State of Iowa, have invented certain new and useiul Improvements in Sash-Latch Locks and Antirattlers, oi' which the Afollowing is a specification.

This invention is a sash latch lock and anti-rattler for windows, which does away with the necessity for providing any other' form of lock or a device for preventing the window from rattling.

One object of this invention is the prodiution of a latch which when in operation will retain the window in an adjusted position at various elevations without the necessity of the ordinary window weights, and ropes commonly employed forthispurpose.

Another object of this invention is the production of a latch which will not only hold the window in an adjusted elevation, but will also prevent the same from rattling.

Another object of this invention is the production of a latch which includes aspring mounted within the casing, and theprovision of means. for `holding this `springy in releasable engagementv with a corrugated strip, whereby the window will be retained in a desired elevation and will also be prevented from rattling.A

A still further object of this invention is the production of a latch wherein a cam member is employed for engaging the spring and releasably holdingthe same when the device is in operation.

4Broadly stated, the invention consists of a casing, carried by the sash and a corrugated strip carried by the window frame, a flat spring mounted within the casing and having a portion extending from the casing to engage the corrugated strip and a cam member carried by the casing for engaging the spring and releasably holding the bowed member in engagement with the strip, thus retaining the window in a locked position at a desired elevation and also preventing the same from rattling.

One practical form of construction and assembly of the present invention will be hereinafter described and is illustrated in the accompanying drawing, in which- Figure 1 is a front elevation of the device, a window frame and sash being shown in fragmentary elevation.

Fig. 2 is a section taken on the line 2-2 of Fig. 1, and A Fig. 3 is a vertical section taken on the line 3 3 of Fig. 2.

In the preferred embodiment of the present invention about to be described, it will be seen that the sash latch lock and antirattler is illustrated-in connection with the window frame 5 having the usual groove 6 in which the sash 7 is slidable. 1t will be noted that the present invention is so constructed as to be used in connectio-n with any form of a sash now in use and it will hold the sash against rattling and it is also obvious that when the device is built with the window frame and sash, the necessity for providing counter-balancing windowv weights is eliminated.

The elongated corrugated strip 8 is ixedlyv carried within the groove 6 of the window 5. This elongated strip extends vertically and very close to the side of the window sash, to be engaged by the bowed portion 01"' the spring to be hereinafter described.

The sash 7 is provided with a pocket 9 in which the rectangular casing 10 is positioned. This casing 10 is provided with lugs 11 extending from its ends and the lugs 11 are held in engagement with the sash 7 by the screws 12 lpassing through the lugs and engaging the sash, as shown clearly in Fig. 3.

The spring is indicated in general at 13 and comprises a long arm 14 and a short i arm 15 connected together by a loop 16. The loop 16 is carried upon a pin 17 supported by the casing 10. 1t`will be noted that the short arm 15 has a curved portion 18 bearing upon the inner surface of the casing 10, thus urging the long arm 14 in the opposite direction. This long arm 14: is provided with a substantially semi-circular bowed portion 19 which extends through the opening 20 formed in the casing 10, whereby this bowed portion 19 will bear upon the corrugated strip 8.

The cam member 21 is provided with a lip 22 for engaging the bowed portion 19 oi' the long arm 14, although it will be noted that an extension 23 extends beyond the bowed portion 19 of the long arm 14. Therefore, the cam 21 will bear upon the extension 23 for positively holding the bowed portion 19 in engagement with the strip 8, while the lip 22 will limit the rotary movement of the cam 2l in one direction. This cam Qi is mounted upon a squared shaft 2st extending through the casinor and carrying upon its outer projecting end a button 25, whereby the squared shaft 24 may be rotated.

l,Vhon the device is in operation, the button 25 may be turned for turning the shaft 24C and swinging the cam member 2l, into a binding engagement with the bowed portion and the extension of the long arm lll. Therefore, the window sash 7 may be shifted upwardly or downwardly, for at this time, the long arm will not be held in a set position by the cam and for this reason may be freely swung and permit the bowed portion 19 thereof to ide over the corrugations of the strip 8. However, when the sash arrives at a point where it is to be iinally retained, the button Q5 is turned for causing the shaft 2 to swing the forward end of the cam member into a binding engagement with the bowed portion and the extension 23 of the long arm l-lf. is hereinbefore explained, the lip 22 will limit the movement of the cam member in one direction and for this reason the b ,wed portion 19 will be held in firm engagement with one corrugation of the strip S, as shown in Fig. 3. Therefore, the sash will be locked at a desired height and it is therefore obvious that it will be impossible to shift the sash by an unauthorized party. Furthermore, the ash will be held against movement and for this reason it is not necessary to provide the usual counter-balancing sash or window weight and it is also obvious that the binding engagement. of the looped portion and the corrugated portion will hold the sash against rattling.

From the foregoing description it will be seen that a. very simple and efficient latch has been provided for a window sash which is constructed of a minimum number of parts and for this reason can be produced at a minimum cost and the possibility of the same becoming inoperative in use, due to a complicated construction, is prevented. lt is also seen that the button may be quickly turned for releasing the bowed portion from a binding engagement with the strip and at this time the sash may be easily shifted at the will of the operator, although the button may be again turned for causing the cam to again bind the bowed portion in engagement with the corrugated strip.

The foregoing description and the drawings have reference to what may be considcred the preferred, or approved, form of my invention. It is to be understood that I may make such changes in construction and arrangement and combination of parts, materials, dimensions, et cetera, as may prove expedient and fall within the scope of the appended claim.

Having thus fully described my invention, what l claim as new and desire to secure by Letters Patent, is

A device of the character described comprising a support, a spring carried upon said support and comprising an arm having a loop adjacent one end, an extension projecting beyond the loop, a cam member rotatably mounted upon said support, said cam member having a flat face, a lip extending from the cam member adjacent the flat face, whereby the cam member may be swung into engagement with the extension of the spring, thus holding the loop in an eX- tended condition, while said lip will engage the looped portion for holding the cam against accidental rotation in one direction, thus holding the cam against accidentally disengaging the spring.

ln testimony whereof I aliiX my signature in presence of two witnesses.

BEVILL l/V. WHITWORTH.

Witnesses:

Lno. H. PAULGER, GEO. A. MORRISON.

Copies of this patent may be obtained for ave cents each, by addressing the Commissioner of Patents, Washington, D. C. 

